function Layout(){
    this.width = $(window).width();
    this.height = $(window).height();
}

Layout.prototype = {

    iframe: function(){
        var iframeHeight = this.height - 85;
        $('#change').css("height", iframeHeight + 'px');
        // $('#change').css({width: iframeWidth + 'px',height: iframeHeight + 'px'});
    }
};